Inclined
disk and balls.
The partitions set at an angle between the outer and inner
rim of the wheel roll the balls toward the center on one side and
toward the periphery on the other side of the disk. Attached to a screw
pump. 1660. A type of scores of water-raising devices by perpetual
motion in the seventeenth and eighteenth centuries. The Archimedean
screw seems to have had a strong hold on the minds of perpetual-motion
inventors.
(Subsection 948, from
p.379)
From: Gardner D. Hiscox, M.E., Mechanical Appliances and Novelties of Construction (1927), Norman W. Henley Publ. Co.
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
